Hi. I'm David, and I'm happy to help you.
The accounts highlighted in the screenshot are work or school accounts.
Disconnect a work or school account as instructed below.
- Press "Windows + I" and select "Accounts > Access work or school";
- Select the account you want to remove and click "Disconnect".
(Do this for each account you want to remove.)
Feel free to ask back any questions. Click on the "Reply" button below my reply.